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Commit b13138ef authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

bpf: also show process name/pid in bpf_jit_dump 



It can be useful for testing to see the actual process/pid who is loading
a given filter. I was running some BPF test program and noticed unusual
filter loads from time to time, triggered by some other application in the
background. bpf_jit_disasm is still working after this change.

Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 485d6511

include/linux/filter.h

+4 −2
Original line number Original line Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/linkage.h>

#include <linux/linkage.h>

#include <linux/printk.h>

#include <linux/printk.h>

#include <linux/workqueue.h>

#include <linux/workqueue.h>

#include <linux/sched.h>





#include <asm/cacheflush.h>

#include <asm/cacheflush.h>
@@ -438,8 +439,9 @@ void bpf_jit_free(struct bpf_prog *fp); 
static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen,

static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen,

				u32 pass, void *image)

				u32 pass, void *image)

{

{

	pr_err("flen=%u proglen=%u pass=%u image=%pK\n",

	pr_err("flen=%u proglen=%u pass=%u image=%pK from=%s pid=%d\n", flen,

	       flen, proglen, pass, image);

	       proglen, pass, image, current->comm, task_pid_nr(current));



	if (image)

	if (image)

		print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET,

		print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET,

			       16, 1, image, proglen, false);

			       16, 1, image, proglen, false);